Only update canvas if not dirty

2015-07-09 16:31:40 -06:00
parent d5aa0d9a8e
commit 643c2e6f21
1 changed files with 4 additions and 1 deletions
--- a/src/ol/source/rastersource.js
+++ b/src/ol/source/rastersource.js
@@ -318,7 +318,10 @@ ol.source.Raster.prototype.onWorkerComplete_ =
  this.dispatchEvent(new ol.source.RasterEvent(
      ol.source.RasterEventType.AFTEROPERATIONS, frameState, data));

-  this.canvasContext_.putImageData(output, 0, 0);
+  var resolution = frameState.viewState.resolution / frameState.pixelRatio;
+  if (!this.isDirty_(frameState.extent, resolution)) {
+    this.canvasContext_.putImageData(output, 0, 0);
+  }

  callback(null);
 };